Freescale Semiconductor, Inc.
SECTION 1
DEVICE OVERVIEW
The MC68340 is a high-performance 32-bit integrated processor with direct memory
access (DMA), combining an enhanced M68000-compatible processor, 32-bit DMA, and
other peripheral subsystems on a single integrated circuit. The MC68340 CPU32 delivers
32-bit CISC processor performance from a lower cost 16-bit memory system. The
combination of peripherals offered in the MC68340 can be found in a diverse range of
microprocessor-based systems, including embedded control and general computing.
Systems requiring very high-speed block transfers of data can especially benefit from the
MC68340.
The MC68340's high level of functional integration results in significant reductions in
component count, power consumption, board space, and cost while yielding much higher
system reliability and shorter design time. The 3.3-V MC68340V is particularly attractive to
applications requiring a very tight power budget. Complete code compatibility with the
MC68000 and MC68010 affords the designer access to a broad base of established real-
time kernels, operating systems, languages, applications, and development tools—many
oriented towards embedded control.
SYSTEM
INTEGRATION
MODULE
TWO-
CHANNEL
SERIAL
I/O
(SIM40)
CPU32
68020– BASED
PROCESSOR
SYSTEM
PROTECTION
CHIP SELECTS
AND
WAIT STATES
CLOCK
SYNTHESIZER
INTERMODULE BUS
EXTERNAL
BUS
INTERFACE
BUS
ARBITRATION
TWO-CHANNEL DMA
CONTROLLER
TIMER
TIMER
IEEE TEST
Figure 1-1. Block Diagram
MOTOROLA
MC68340 USER’S MANUAL
1- 1
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